1
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Dietz JD, Kröger M, Hoy RS. Validation and Refinement of Unified Analytic Model for Flexible and Semiflexible Polymer Melt Entanglement. Macromolecules 2022; 55:3613-3626. [PMID: 35571224 PMCID: PMC9097689 DOI: 10.1021/acs.macromol.1c02597] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/23/2022] [Indexed: 11/28/2022]
Abstract
We combine molecular dynamics simulations and topological analyses (TA) to validate and refine a recently proposed unified analytic model [Hoy, R. S.; Kröger, M. Phys. Rev. Lett. 2020, 124, 147801] for the reduced entanglement length, tube diameter, and plateau modulus of polymer melts. While the functional forms of the previously published expressions are insensitive to the choice of the TA method and N e -estimator, obtaining better statistics and eliminating all known sources of systematic error in the N e -estimation alters their numerical coefficients. Our revised expressions quantitatively match bead-spring simulation data over the entire range of chain stiffnesses for which systems remain isotropic, semiquantitatively match all available experimental data for flexible, semiflexible, and stiff polymer melts (including new data for conjugated polymers that lie in a previously unpopulated stiffness regime), and outperform previously developed unified scaling theories.
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Affiliation(s)
- Joseph D. Dietz
- Department of Physics, University of South Florida, Tampa, Florida 33620, United States
| | - Martin Kröger
- Department of Materials, Polymer Physics, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Robert S. Hoy
- Department of Physics, University of South Florida, Tampa, Florida 33620, United States
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2
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Senses E, Kitchens CL, Faraone A. Viscosity reduction in polymer nanocomposites: Insights from dynamic neutron and X‐ray scattering. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20210320] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Erkan Senses
- Department of Chemical and Biological Engineering Koc University Istanbul Turkey
| | - Christopher L. Kitchens
- Department of Chemical and Biomolecular Engineering Clemson University Clemson South Carolina USA
| | - Antonio Faraone
- Center for Neutron Research National Institute of Standards and Technology Gaithersburg Maryland USA
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3
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Maiz J, Verde-Sesto E, Asenjo-Sanz I, Mangin-Thro L, Frick B, Pomposo JA, Arbe A, Colmenero J. Disentangling Component Dynamics in an All-Polymer Nanocomposite Based on Single-Chain Nanoparticles by Quasielastic Neutron Scattering. Macromolecules 2022; 55:2320-2332. [PMID: 35355834 PMCID: PMC8945772 DOI: 10.1021/acs.macromol.1c02382] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 02/11/2022] [Indexed: 11/30/2022]
Abstract
![]()
We
have investigated an all-polymer nanocomposite (NC) consisting
of single-chain nanoparticles (SCNPs) immersed in a matrix of linear
chains of their precursors (25/75% composition in weight). The SCNPs
were previously synthesized via “click” chemistry, which
induces intramolecular cross-links in the individual macromolecules
accompanied by a slight shift (5–8 K) of the glass transition
temperature toward higher values and a broadening of the dynamic response
with respect to the raw precursor material. The selective investigation
of the dynamics of the NC components has been possible by using properly
isotopically labeled materials and applying quasielastic neutron scattering
techniques. Results have been analyzed in the momentum transfer range
where the coherent scattering contribution is minimal, as determined
by complementary neutron diffraction experiments with polarization
analysis. We observe the development of dynamic heterogeneity in the
intermediate scattering function of the NC components, which grows
with increasing time. Local motions in the precursor matrix of the
NC are accelerated with respect to the reference bulk behavior, while
the displacements of SCNPs’ hydrogens show enhanced deviations
from Gaussian and exponential behavior compared with the pure melt
of SCNPs. The resulting averaged behavior in the NC coincides with
that of the pure precursor, in accordance with the macroscopic observations
by differential scanning calorimetry (DSC) experiments.
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Affiliation(s)
- Jon Maiz
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
- IKERBASQUE-Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
| | - Ester Verde-Sesto
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
| | - Isabel Asenjo-Sanz
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
| | - Lucile Mangin-Thro
- Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - Bernhard Frick
- Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - José A. Pomposo
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
- IKERBASQUE-Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Universidad del País Vasco-Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia-San Sebastián, Spain
| | - Arantxa Arbe
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
| | - Juan Colmenero
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Universidad del País Vasco-Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia-San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizábal 4, 20018 Donostia-San Sebastián, Spain
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4
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Darvishi S, Nazeer MA, Tyagi M, Zhang Q, Narayanan S, Kizilel S, Senses E. Nonlinear Architectures Can Alter the Dynamics of Polymer–Nanoparticle Composites. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saeid Darvishi
- Department of Chemical and Biological Engineering, Koc University, Sariyer, Istanbul 34450, Turkey
| | - Muhammad Anwaar Nazeer
- Department of Chemical and Biological Engineering, Koc University, Sariyer, Istanbul 34450, Turkey
- School of Engineering and Technology, National Textile University, Faisalabad 37610, Pakistan
| | - Madhusudan Tyagi
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8562, United States
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742-2115, United States
| | - Qingteng Zhang
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Suresh Narayanan
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Seda Kizilel
- Department of Chemical and Biological Engineering, Koc University, Sariyer, Istanbul 34450, Turkey
| | - Erkan Senses
- Department of Chemical and Biological Engineering, Koc University, Sariyer, Istanbul 34450, Turkey
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5
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Scheutz GM, Elgoyhen J, Bentz KC, Xia Y, Sun H, Zhao J, Savin DA, Sumerlin BS. Mediating covalent crosslinking of single-chain nanoparticles through solvophobicity in organic solvents. Polym Chem 2021. [DOI: 10.1039/d1py00780g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photoinduced intrachain crosslinking of coumarin-containing copolymers in various organic solvents was mediated through the solvophobic effect, providing control over the reaction rate and the compaction of the final single-chain nanoparticles.
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Affiliation(s)
- Georg M. Scheutz
- George & Josephine Butler Polymer Research Laboratory
- Center for Macromolecular Science & Engineering
- Department of Chemistry
- University of Florida
- Gainesville
| | - Justine Elgoyhen
- George & Josephine Butler Polymer Research Laboratory
- Center for Macromolecular Science & Engineering
- Department of Chemistry
- University of Florida
- Gainesville
| | - Kyle C. Bentz
- George & Josephine Butler Polymer Research Laboratory
- Center for Macromolecular Science & Engineering
- Department of Chemistry
- University of Florida
- Gainesville
| | - Yening Xia
- George & Josephine Butler Polymer Research Laboratory
- Center for Macromolecular Science & Engineering
- Department of Chemistry
- University of Florida
- Gainesville
| | - Hao Sun
- George & Josephine Butler Polymer Research Laboratory
- Center for Macromolecular Science & Engineering
- Department of Chemistry
- University of Florida
- Gainesville
| | - Junpeng Zhao
- Faculty of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Daniel A. Savin
- George & Josephine Butler Polymer Research Laboratory
- Center for Macromolecular Science & Engineering
- Department of Chemistry
- University of Florida
- Gainesville
| | - Brent S. Sumerlin
- George & Josephine Butler Polymer Research Laboratory
- Center for Macromolecular Science & Engineering
- Department of Chemistry
- University of Florida
- Gainesville
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6
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Maiz J, Verde-Sesto E, Asenjo-Sanz I, Fouquet P, Porcar L, Pomposo JA, de Molina PM, Arbe A, Colmenero J. Collective Motions and Mechanical Response of a Bulk of Single-Chain Nano-Particles Synthesized by Click-Chemistry. Polymers (Basel) 2020; 13:E50. [PMID: 33375589 PMCID: PMC7795070 DOI: 10.3390/polym13010050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 12/17/2020] [Accepted: 12/18/2020] [Indexed: 11/16/2022] Open
Abstract
We investigate the effect of intra-molecular cross-links on the properties of polymer bulks. To do this, we apply a combination of thermal, rheological, diffraction, and neutron spin echo experiments covering the inter-molecular as well as the intermediate length scales to melts of single-chain nano-particles (SCNPs) obtained through 'click' chemistry. The comparison with the results obtained in a bulk of the corresponding linear precursor chains (prior to intra-molecular reaction) and in a bulk of SCNPs obtained through azide photodecomposition process shows that internal cross-links do not influence the average inter-molecular distances in the melt, but have a profound impact at intermediate length scales. This manifests in the structure, through the emergence of heterogeneities at nanometric scale, and also in the dynamics, leading to a more complex relaxation behavior including processes that allow relaxation of the internal domains. The influence of the nature of the internal bonds is reflected in the structural relaxation that is slowed down if bulky cross-linking agents are used. We also found that any residual amount of cross-links is critical for the rheological behavior, which can vary from an almost entanglement-free polymer bulk to a gel. The presence of such inter-molecular cross-links additionally hinders the decay of density fluctuations at intermediate length scales.
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Affiliation(s)
- Jon Maiz
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain; (E.V.-S.); (I.A.-S.); (J.A.P.); (P.M.d.M.); (A.A.); (J.C.)
- IKERBASQUE-Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
| | - Ester Verde-Sesto
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain; (E.V.-S.); (I.A.-S.); (J.A.P.); (P.M.d.M.); (A.A.); (J.C.)
| | - Isabel Asenjo-Sanz
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain; (E.V.-S.); (I.A.-S.); (J.A.P.); (P.M.d.M.); (A.A.); (J.C.)
| | - Peter Fouquet
- Institut Laue-Langevin, 71 Avenue des Martyrs, CEDEX 9, 38042 Grenoble, France; (P.F.); (L.P.)
| | - Lionel Porcar
- Institut Laue-Langevin, 71 Avenue des Martyrs, CEDEX 9, 38042 Grenoble, France; (P.F.); (L.P.)
| | - José A. Pomposo
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain; (E.V.-S.); (I.A.-S.); (J.A.P.); (P.M.d.M.); (A.A.); (J.C.)
- IKERBASQUE-Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Universidad del País Vasco-Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia-San Sebastián, Spain
| | - Paula Malo de Molina
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain; (E.V.-S.); (I.A.-S.); (J.A.P.); (P.M.d.M.); (A.A.); (J.C.)
- IKERBASQUE-Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
| | - Arantxa Arbe
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain; (E.V.-S.); (I.A.-S.); (J.A.P.); (P.M.d.M.); (A.A.); (J.C.)
| | - Juan Colmenero
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizábal 5, 20018 Donostia-San Sebastián, Spain; (E.V.-S.); (I.A.-S.); (J.A.P.); (P.M.d.M.); (A.A.); (J.C.)
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología, Universidad del País Vasco-Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia-San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizábal 4, 20018 Donostia-San Sebastián, Spain
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7
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Zhang YY, Jia XM, Shi R, Li SJ, Zhao H, Qian HJ, Lu ZY. Synthesis of Polymer Single-Chain Nanoparticle with High Compactness in Cosolvent Condition: A Computer Simulation Study. Macromol Rapid Commun 2020; 41:e1900655. [PMID: 32134543 DOI: 10.1002/marc.201900655] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/21/2020] [Accepted: 01/28/2020] [Indexed: 01/27/2023]
Abstract
Polymeric single-chain nanoparticles (SCNPs) are soft nano-objects synthesized by intramolecular crosslinking of isolated single polymer chains. Syntheses of such SCNPs usually need to be performed in a dilute solution. In such a condition, the bonding probability of the two active crosslinking units at a short contour distance along the chain backbone is much higher than those which are far away from each other. Such a reaction condition often results in local spheroidization and, therefore, the formation of loosely packed structures. How to inhibit the local spheroidization and improve the compactness of SCNPs is thus a major challenge for the syntheses of SCNPs. In this study, computer simulations are performed and the fact that a precollapse of the polymer chain conformation in a cosolvent condition can largely improve the probability of the crosslinking reactions at large contour distances is demonstrated, favoring the formations of closely packed globular structures. As a result, the formed SCNPs can be more spherical and have higher compactness than those fabricated in ultradilute good solvent solution in a conventional way. It is believed this simulation work can provide a insight into the effective syntheses of SCNPs with spherical conformations and high compactness.
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Affiliation(s)
- Yue-Yuan Zhang
- State Key Laboratory of Supramolecular Structure and Materials, International Joint Research Laboratory of Nano-Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Xiang-Meng Jia
- State Key Laboratory of Supramolecular Structure and Materials, International Joint Research Laboratory of Nano-Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Rui Shi
- State Key Laboratory of Supramolecular Structure and Materials, International Joint Research Laboratory of Nano-Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Shu-Jia Li
- State Key Laboratory of Supramolecular Structure and Materials, International Joint Research Laboratory of Nano-Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Huanyu Zhao
- State Key Laboratory of Supramolecular Structure and Materials, International Joint Research Laboratory of Nano-Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Hu-Jun Qian
- State Key Laboratory of Supramolecular Structure and Materials, International Joint Research Laboratory of Nano-Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Zhong-Yuan Lu
- State Key Laboratory of Supramolecular Structure and Materials, International Joint Research Laboratory of Nano-Micro Architecture Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
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8
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Engelke J, Tuten BT, Schweins R, Komber H, Barner L, Plüschke L, Barner-Kowollik C, Lederer A. An in-depth analysis approach enabling precision single chain nanoparticle design. Polym Chem 2020. [DOI: 10.1039/d0py01045f] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of single chain nanoparticles (SCNPs) is a vibrant field in macromolecular science. However, to achieve an in-depth understanding of the nature of intramolecular polymer folding, a step-change in the methodologies for SCNP analysis is required.
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Affiliation(s)
- Johanna Engelke
- School of Chemistry and Physics
- Queensland University of Technology (QUT)
- Brisbane
- Australia
- Leibniz-Institut für Polymerforschung Dresden
| | - Bryan T. Tuten
- School of Chemistry and Physics
- Queensland University of Technology (QUT)
- Brisbane
- Australia
- Centre for Materials Science
| | - Ralf Schweins
- Institut Laue-Langevin
- DS/LSS
- CS 20 156
- 38042 Grenoble CEDEX 9
- France
| | - Hartmut Komber
- Leibniz-Institut für Polymerforschung Dresden
- 01069 Dresden
- Germany
| | - Leonie Barner
- School of Chemistry and Physics
- Queensland University of Technology (QUT)
- Brisbane
- Australia
- Centre for Materials Science
| | - Laura Plüschke
- Leibniz-Institut für Polymerforschung Dresden
- 01069 Dresden
- Germany
- School of Science
- Technische Universität Dresden
| | - Christopher Barner-Kowollik
- School of Chemistry and Physics
- Queensland University of Technology (QUT)
- Brisbane
- Australia
- Centre for Materials Science
| | - Albena Lederer
- Leibniz-Institut für Polymerforschung Dresden
- 01069 Dresden
- Germany
- School of Science
- Technische Universität Dresden
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9
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Klonos PA, Patelis N, Glynos E, Sakellariou G, Kyritsis A. Molecular Dynamics in Polystyrene Single-Chain Nanoparticles. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b02070] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Panagiotis A. Klonos
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Nikolaos Patelis
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografrou, 15771 Athens, Greece
| | - Emmanouil Glynos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O.
Box 1385, Heraklion, 711 10 Crete, Greece
| | - Georgios Sakellariou
- Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis Zografrou, 15771 Athens, Greece
| | - Apostolos Kyritsis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
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10
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Abstract
We review recent neutron scattering work and related results from simulation and complementary techniques focusing on the microscopic dynamics of polymers under confinement. Confinement is either realized in model porous materials or in polymer nanocomposites (PNC). The dynamics of such confined polymers is affected on the local segmental level, the level of entanglements as well as on global levels: (i) at the segmental level the interaction with the surface is of key importance. At locally repulsive surfaces compared to the bulk the segmental dynamics is not altered. Attractive surfaces slow down the segmental dynamics in their neighborhood but do not give rise to dead, glassy layers. (ii) Confinement generally has little effect on the inter-chain entanglements: both for weakly as well as for marginally confined polymers the reptation tube size is not changed. Only for strongly confined polymers disentanglement takes place. Similarly, in PNC at higher NP loading disentanglement phenomena are observed; in addition, at very high loading a transition from polymer caused topological constraints to purely geometrical constraints is observed. (iii) On the more global scale NSE experiments revealed important information on the nature of the interphase between adsorbed layer and bulk polymer. (iv) Polymer grafts at NP mutually confine each other, an effect that is most pronounced for one component NP. (v) Global diffusion of entangled polymers both in weakly and strongly attractive PNC is governed by the ratio of bottle-neck to chain size that characterizes the 'entropic barrier' for global diffusion.
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Affiliation(s)
- Dieter Richter
- Jülich Centre for Neutron Science (JCNS-1) and Institute of Complex Systems (ICS-1), Forschungszentrum Jülich GmbH, Jülich, Germany.
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11
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Robles-Hernández B, Monnier X, Pomposo JA, Gonzalez-Burgos M, Cangialosi D, Alegría A. Glassy Dynamics of an All-Polymer Nanocomposite Based on Polystyrene Single-Chain Nanoparticles. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01257] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Beatriz Robles-Hernández
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Xavier Monnier
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | - Jose A. Pomposo
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- IKERBASQUE-Basque Foundation for Science, María Díaz de Haro 3, E-48013 Bilbao, Spain
| | - Marina Gonzalez-Burgos
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Daniele Cangialosi
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
| | - Angel Alegría
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
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12
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Martin HJ, White BT, Yuan G, Saito T, Dadmun MD. Relative Size of the Polymer and Nanoparticle Controls Polymer Diffusion in All-Polymer Nanocomposites. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02596] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Halie J. Martin
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - B. Tyler White
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Guangcui Yuan
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
- University of Georgetown, Washington, D.C. 20057, United States
| | - Tomonori Saito
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Mark D. Dadmun
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
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13
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Robles-Hernández B, González-Burgos M, Pomposo JA, Colmenero J, Alegría Á. Glass-Transition Dynamics of Mixtures of Linear Poly(vinyl methyl ether) with Single-Chain Polymer Nanoparticles: Evidence of a New Type of Nanocomposite Materials. Polymers (Basel) 2019; 11:E533. [PMID: 30960517 PMCID: PMC6473516 DOI: 10.3390/polym11030533] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 03/12/2019] [Accepted: 03/18/2019] [Indexed: 01/21/2023] Open
Abstract
Single-chain polymer nanoparticles (SCNPs) obtained through chain collapse by intramolecular cross-linking are attracting increasing interest as components of all-polymer nanocomposites, among other applications. We present a dielectric relaxation study on the dynamics of mixtures of poly(vinyl methyl ether) (PVME) and polystyrene (PS)-based SCNPs with various compositions. Analogous dielectric measurements on a miscible blend of PVME with the linear precursor chains of the SCNPs are taken as reference for this study. Both systems present completely different behaviors: While the blend with the linear precursor presents dynamics very similar to that reported for PVME/PS miscible blends, in the PVME/SCNP mixtures there are an appreciable amount of PVME segments that are barely affected by the presence of SCNPs, which nearly vanishes only for mixtures with high SCNP content. Interestingly, in the frame of a simple two-phase system, our findings point towards the existence of a SCNP-rich phase with a constant PVME fraction, regardless of the overall concentration of the mixture. Moreover, the dynamics of the PVME segments in this SCNP-rich phase display an extreme dynamic heterogeneity, a signature of constraint effects.
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Affiliation(s)
- Beatriz Robles-Hernández
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain.
- Donostia International Physics Center (DIPC), Paseo Manuel Lardizábal 4, 20018 San Sebastián, Spain.
| | - Marina González-Burgos
- Materials Physics Center, CSIC-UPV/EHU, Paseo Manuel Lardizábal 5, 20018 San Sebastián, Spain.
| | - José A Pomposo
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain.
- Materials Physics Center, CSIC-UPV/EHU, Paseo Manuel Lardizábal 5, 20018 San Sebastián, Spain.
- IKERBASQUE-Basque Foundation for Science, María Díaz de Haro 3, E-48013 Bilbao, Spain.
| | - Juan Colmenero
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain.
- Donostia International Physics Center (DIPC), Paseo Manuel Lardizábal 4, 20018 San Sebastián, Spain.
- Materials Physics Center, CSIC-UPV/EHU, Paseo Manuel Lardizábal 5, 20018 San Sebastián, Spain.
| | - Ángel Alegría
- Departamento de Física de Materiales, University of the Basque Country (UPV/EHU), Apartado 1072, 20080 San Sebastián, Spain.
- Materials Physics Center, CSIC-UPV/EHU, Paseo Manuel Lardizábal 5, 20018 San Sebastián, Spain.
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14
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Rubio-Cervilla J, Malo de Molina P, Robles-Hernández B, Arbe A, Moreno AJ, Alegría A, Colmenero J, Pomposo JA. Facile Access to Completely Deuterated Single-Chain Nanoparticles Enabled by Intramolecular Azide Photodecomposition. Macromol Rapid Commun 2019; 40:e1900046. [PMID: 30801882 DOI: 10.1002/marc.201900046] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Indexed: 01/14/2023]
Abstract
Access to completely deuterated single-chain nanoparticles (dSCNPs) has remained an unresolved issue. Herein, the first facile and efficient procedure to produce dSCNPs is reported, which comprises: i) the use of commercially available perdeuterated cyclic ether monomers as starting reagents, ii) a ring-opening copolymerization process performed in bulk to produce a neat dSCNP precursor, iii) a standard azidation reaction to decorate this precursor with azide moieties, and iv) a facile intramolecular azide photodecomposition step carried out under UV irradiation at high dilution providing with highly valuable, completely deuterated soft nano-objects from the precursor. dSCNPs are used to investigate by means of neutron-scattering measurements the form factor (radius of gyration, scaling exponent) of polyethylene oxide (PEO) chains in nanocomposites with different amounts of dSCNPs. Moreover, to illustrate the possibilities offered by the synthetic route disclosed in this communication for potential applications, the significant reduction in viscosity observed in a pure melt of polyether-based single-chain nanoparticles when compared to a melt of the corresponding linear polymer chains is shown.
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Affiliation(s)
- Jon Rubio-Cervilla
- Centro de Física de Materiales (CSIC, UPV/EHU)-MPC Materials Physics Center, Paseo Manuel de Lardizabal 5, 20018, San Sebastian, Spain
| | - Paula Malo de Molina
- Centro de Física de Materiales (CSIC, UPV/EHU)-MPC Materials Physics Center, Paseo Manuel de Lardizabal 5, 20018, San Sebastian, Spain.,Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018, San Sebastian, Spain
| | - Beatriz Robles-Hernández
- Centro de Física de Materiales (CSIC, UPV/EHU)-MPC Materials Physics Center, Paseo Manuel de Lardizabal 5, 20018, San Sebastian, Spain.,Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018, San Sebastian, Spain
| | - Arantxa Arbe
- Centro de Física de Materiales (CSIC, UPV/EHU)-MPC Materials Physics Center, Paseo Manuel de Lardizabal 5, 20018, San Sebastian, Spain
| | - Angel J Moreno
- Centro de Física de Materiales (CSIC, UPV/EHU)-MPC Materials Physics Center, Paseo Manuel de Lardizabal 5, 20018, San Sebastian, Spain.,Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018, San Sebastian, Spain
| | - Angel Alegría
- Centro de Física de Materiales (CSIC, UPV/EHU)-MPC Materials Physics Center, Paseo Manuel de Lardizabal 5, 20018, San Sebastian, Spain.,Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080, San Sebastian, Spain
| | - Juan Colmenero
- Centro de Física de Materiales (CSIC, UPV/EHU)-MPC Materials Physics Center, Paseo Manuel de Lardizabal 5, 20018, San Sebastian, Spain.,Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018, San Sebastian, Spain.,Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080, San Sebastian, Spain
| | - José A Pomposo
- Centro de Física de Materiales (CSIC, UPV/EHU)-MPC Materials Physics Center, Paseo Manuel de Lardizabal 5, 20018, San Sebastian, Spain.,Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU), Apartado 1072, 20080, San Sebastian, Spain.,IKERBASQUE-Basque Foundation for Science, María Díaz de Haro 3, 48013, Bilbao, Spain
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15
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Dhiman I, Shrestha U, Bhowmik D, Cole D, Gautam S. Influence of molecular shape on self-diffusion under severe confinement: A molecular dynamics study. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2018.08.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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16
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Senses E, Tyagi M, Pasco M, Faraone A. Dynamics of Architecturally Engineered All-Polymer Nanocomposites. ACS NANO 2018; 12:10807-10816. [PMID: 30299918 PMCID: PMC11168023 DOI: 10.1021/acsnano.8b02514] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present nanocomposite materials formed by using glassy star-shaped polymers as nanofillers and dispersing them in soft matrices. The resulting "architecturally engineered" polymer nanocomposites structurally reside between the linear homopolymer blends and the conventional polymer nanocomposites with inorganic fillers, inducing reinforcement, which can be as strong as that of solid nanoparticles, or softening depending on the compactness and concentration of the nanoparticles. Such behavior can be traced back to the dynamical features at the local segmental and the chain level, which we investigated using neutron scattering over a wide range of time and length scales in the glassy and melt states of the nanocomposites. The local and segmental dynamics as well as the degree of chain-chain entanglements are all modified by the star-shaped fillers. The presented approach to tuning the physical properties of all-polymer-based nanocomposites is readily adaptable to other polymer architectures with immediate applications in numerous areas including gas separation membranes, tissue engineering, drug delivery, and functional coatings.
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Affiliation(s)
- Erkan Senses
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg , Maryland 20899-8562 United States
- Department of Materials Science and Engineering , University of Maryland , College Park , Maryland 20742-2115 , United States
- Department of Chemical and Biological Engineering , Koc University , Rumelifeneri Yolu, 34450 , Sariyer , Istanbul , Turkey
| | - Madhusudan Tyagi
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg , Maryland 20899-8562 United States
- Department of Materials Science and Engineering , University of Maryland , College Park , Maryland 20742-2115 , United States
| | - Madeleine Pasco
- Department of Biology , Rose-Hulman Institute of Technology , Terre Haute , Indiana 47803 , United States
| | - Antonio Faraone
- NIST Center for Neutron Research, National Institute of Standards and Technology , Gaithersburg , Maryland 20899-8562 United States
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17
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González-Burgos M, Arbe A, Moreno AJ, Pomposo JA, Radulescu A, Colmenero J. Crowding the Environment of Single-Chain Nanoparticles: A Combined Study by SANS and Simulations. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02438] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Marina González-Burgos
- Materials
Physics Center (MPC), Centro de Física de Materiales (CFM) (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Arantxa Arbe
- Materials
Physics Center (MPC), Centro de Física de Materiales (CFM) (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Angel J. Moreno
- Materials
Physics Center (MPC), Centro de Física de Materiales (CFM) (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - José A. Pomposo
- Materials
Physics Center (MPC), Centro de Física de Materiales (CFM) (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- IKERBASQUE
- Basque
Foundation for Science, María
Díaz de Haro 3, 48013 Bilbao, Spain
- Departamento
de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain
| | - Aurel Radulescu
- Jülich
Centre for Neutron Science, Forschungszentrum Jülich GmbH, Outstation
at Heinz Maier-Leibnitz Zentrum, Lichtenbergstr.1, 85747 Garching, Germany
| | - Juan Colmenero
- Materials
Physics Center (MPC), Centro de Física de Materiales (CFM) (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento
de Física de Materiales, UPV/EHU, Apartado 1072, 20080 San Sebastián, Spain
- Donostia International
Physics Center, Paseo Manuel de Lardizabal
4, 20018 San Sebastián, Spain
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18
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Moreno AJ, Bacova P, Lo Verso F, Arbe A, Colmenero J, Pomposo JA. Effect of chain stiffness on the structure of single-chain polymer nanoparticles. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:034001. [PMID: 29206106 DOI: 10.1088/1361-648x/aa9f5c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Polymeric single-chain nanoparticles (SCNPs) are soft nano-objects synthesized by purely intramolecular cross-linking of single polymer chains. By means of computer simulations, we investigate the conformational properties of SCNPs as a function of the bending stiffness of their linear polymer precursors. We investigate a broad range of characteristic ratios from the fully flexible case to those typical of bulky synthetic polymers. Increasing stiffness hinders bonding of groups separated by short contour distances and increases looping over longer distances, leading to more compact nanoparticles with a structure of highly interconnected loops. This feature is reflected in a crossover in the scaling behaviour of several structural observables. The scaling exponents change from those characteristic for Gaussian chains or rings in θ-solvents in the fully flexible limit, to values resembling fractal or 'crumpled' globular behaviour for very stiff SCNPs. We characterize domains in the SCNPs. These are weakly deformable regions that can be seen as disordered analogues of domains in disordered proteins. Increasing stiffness leads to bigger and less deformable domains. Surprisingly, the scaling behaviour of the domains is in all cases similar to that of Gaussian chains or rings, irrespective of the stiffness and degree of cross-linking. It is the spatial arrangement of the domains which determines the global structure of the SCNP (sparse Gaussian-like object or crumpled globule). Since intramolecular stiffness can be varied through the specific chemistry of the precursor or by introducing bulky side groups in its backbone, our results propose a new strategy to tune the global structure of SCNPs.
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Affiliation(s)
- Angel J Moreno
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain. Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
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19
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Senses E, Tyagi M, Natarajan B, Narayanan S, Faraone A. Chain dynamics and nanoparticle motion in attractive polymer nanocomposites subjected to large deformations. SOFT MATTER 2017; 13:7922-7929. [PMID: 29034930 DOI: 10.1039/c7sm01009e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The effect of large deformation on the chain dynamics in attractive polymer nanocomposites was investigated using neutron scattering techniques. Quasi-elastic neutron backscattering measurements reveal a substantial reduction of polymer mobility in the presence of attractive, well-dispersed nanoparticles. In addition, large deformations are observed to cause a further slowing down of the Rouse rates at high particle loadings, where the interparticle spacings are slightly smaller than the chain dimensions, i.e. in the strongly confined state. No noticeable change, however, was observed for a lightly confined system. The reptation tube diameter, measured by neutron spin echo, remained unchanged after shear, suggesting that the level of chain-chain entanglements is not significantly affected. The shear-induced changes in the interparticle bridging reflect the slow nanoparticle motion measured by X-ray photon correlation spectroscopy. These results provide a first step for understanding how large shear can significantly affect the segmental motion in nanocomposites and open up new opportunities for designing mechanically responsive soft materials.
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Affiliation(s)
- Erkan Senses
- NIST Center for Neutron Research, National Institute of Standards and Technology Gaithersburg, MD 20899-8562, USA.
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20
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Formanek M, Moreno AJ. Effects of precursor topology and synthesis under crowding conditions on the structure of single-chain polymer nanoparticles. SOFT MATTER 2017; 13:6430-6438. [PMID: 28876354 DOI: 10.1039/c7sm01547j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
By means of molecular dynamics simulations, we investigate the formation of single-chain nanoparticles through intramolecular cross-linking of polymer chains, in the presence of their precursors acting as purely steric crowders in concentrated solution. In the case of linear precursors, the structure of the resulting SCNPs is weakly affected by the density at which the synthesis is performed. Crowding has significant effects if ring precursors are used: higher concentrations lead to the formation of SCNPs with more compact and spherical morphologies. Such SCNPs retain in the swollen state (high dilution) the crumpled globular conformations adopted by the ring precursors in the crowded solutions. Increasing the concentration of both the linear and ring precursors up to 30% leads to faster formation of the respective SCNPs, prior to deceleration expected at higher densities. The results presented here propose promising new routes for the synthesis of globular SCNPs, which are usually elusive by conventional methods.
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Affiliation(s)
- Maud Formanek
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain.
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21
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De-La-Cuesta J, González E, Moreno AJ, Arbe A, Colmenero J, Pomposo JA. Size of Elastic Single-Chain Nanoparticles in Solution and on Surfaces. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01199] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Julen De-La-Cuesta
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
| | - Edurne González
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
| | - Angel J. Moreno
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
- Donostia International
Physics Center (DIPC), Paseo Manuel
de Lardizabal 4, E-20018 San Sebastián, Spain
| | - Arantxa Arbe
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
| | - Juan Colmenero
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
- Donostia International
Physics Center (DIPC), Paseo Manuel
de Lardizabal 4, E-20018 San Sebastián, Spain
- Departamento
de Física de Materiales, Universidad del País Vasco (UPV/EHU), Apartado 1072, E-20800 San Sebastián, Spain
| | - José A. Pomposo
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
- Departamento
de Física de Materiales, Universidad del País Vasco (UPV/EHU), Apartado 1072, E-20800 San Sebastián, Spain
- IKERBASQUE - Basque
Foundation for Science, María
Díaz de Haro 3, E-48013 Bilbao, Spain
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22
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Jia XM, Shi R, Jiao GS, Chen T, Qian HJ, Lu ZY. Temperature Effect on Interfacial Structure and Dynamics Properties in Polymer/Single-Chain Nanoparticle Composite. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiang-Meng Jia
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Rui Shi
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Gui-Sheng Jiao
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Tao Chen
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Hu-Jun Qian
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
| | - Zhong-Yuan Lu
- State Key Laboratory of Supramolecular Structure and Materials, and Laboratory of Theoretical and Computational Chemistry; Institute of Theoretical Chemistry; Jilin University; Changchun 130023 China
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23
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24
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Bačová P, Lo Verso F, Arbe A, Colmenero J, Pomposo JA, Moreno AJ. The Role of the Topological Constraints in the Chain Dynamics in All-Polymer Nanocomposites. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02340] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Petra Bačová
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
| | - Federica Lo Verso
- Donostia International
Physics Center (DIPC), Paseo Manuel
de Lardizabal 4, E-20018 San Sebastián, Spain
| | - Arantxa Arbe
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
| | - Juan Colmenero
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
- Donostia International
Physics Center (DIPC), Paseo Manuel
de Lardizabal 4, E-20018 San Sebastián, Spain
- Departamento
de Física de Materiales, UPV/EHU, Apartado 1072, E-20080 San Sebastián, Spain
| | - José A. Pomposo
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
- Departamento
de Física de Materiales, UPV/EHU, Apartado 1072, E-20080 San Sebastián, Spain
- IKERBASQUE - Basque
Foundation for Science, María
Díaz de Haro, E-48013 Bilbao, Spain
| | - Angel J. Moreno
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, E-20018 San Sebastián, Spain
- Donostia International
Physics Center (DIPC), Paseo Manuel
de Lardizabal 4, E-20018 San Sebastián, Spain
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25
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Shrestha UR, Bhowmik D, Van Delinder KW, Mamontov E, O’Neill H, Zhang Q, Alatas A, Chu XQ. Collective Excitations in Protein as a Measure of Balance Between its Softness and Rigidity. J Phys Chem B 2017; 121:923-930. [DOI: 10.1021/acs.jpcb.6b10245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Utsab R. Shrestha
- Department
of Physics and Astronomy, Wayne State University, Detroit, MI 48201, United States
| | - Debsindhu Bhowmik
- Computational
Science and Engineering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States
| | - Kurt W. Van Delinder
- Department
of Physics and Astronomy, Wayne State University, Detroit, MI 48201, United States
| | - Eugene Mamontov
- Chemical
and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States
| | - Hugh O’Neill
- Biology
and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States
| | - Qiu Zhang
- Biology
and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States
| | - Ahmet Alatas
- Advanced
Photon Source, Argonne National laboratory, Argonne, IL 60439, United States
| | - Xiang-Qiang Chu
- Department
of Physics and Astronomy, Wayne State University, Detroit, MI 48201, United States
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26
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Shrestha UR, Perera SMDC, Bhowmik D, Chawla U, Mamontov E, Brown MF, Chu XQ. Quasi-elastic Neutron Scattering Reveals Ligand-Induced Protein Dynamics of a G-Protein-Coupled Receptor. J Phys Chem Lett 2016; 7:4130-4136. [PMID: 27628201 PMCID: PMC5378701 DOI: 10.1021/acs.jpclett.6b01632] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Light activation of the visual G-protein-coupled receptor (GPCR) rhodopsin leads to significant structural fluctuations of the protein embedded within the membrane yielding the activation of cognate G-protein (transducin), which initiates biological signaling. Here, we report a quasi-elastic neutron scattering study of the activation of rhodopsin as a GPCR prototype. Our results reveal a broadly distributed relaxation of hydrogen atom dynamics of rhodopsin on a picosecond-nanosecond time scale, crucial for protein function, as only observed for globular proteins previously. Interestingly, the results suggest significant differences in the intrinsic protein dynamics of the dark-state rhodopsin versus the ligand-free apoprotein, opsin. These differences can be attributed to the influence of the covalently bound retinal ligand. Furthermore, an idea of the generic free-energy landscape is used to explain the GPCR dynamics of ligand-binding and ligand-free protein conformations, which can be further applied to other GPCR systems.
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Affiliation(s)
- Utsab R. Shrestha
- Department of Physics and Astronomy, Wayne State University, Detroit, MI 48201, USA
| | | | - Debsindhu Bhowmik
- Department of Physics and Astronomy, Wayne State University, Detroit, MI 48201, USA
| | - Udeep Chawla
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA
| | - Eugene Mamontov
- Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Michael F. Brown
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA
- Department of Physics, University of Arizona, Tucson, AZ 85721, USA
| | - Xiang-qiang Chu
- Department of Physics and Astronomy, Wayne State University, Detroit, MI 48201, USA
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27
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Dhindsa GK, Bhowmik D, Goswami M, O’Neill H, Mamontov E, Sumpter BG, Hong L, Ganesh P, Chu XQ. Enhanced Dynamics of Hydrated tRNA on Nanodiamond Surfaces: A Combined Neutron Scattering and MD Simulation Study. J Phys Chem B 2016; 120:10059-10068. [DOI: 10.1021/acs.jpcb.6b07511] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Gurpreet K. Dhindsa
- Department
of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, United States
| | - Debsindhu Bhowmik
- Department
of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, United States
| | - Monojoy Goswami
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Computer
Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Hugh O’Neill
- Biology and
Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Eugene Mamontov
- Chemical
and Engineering Materials Division, Oak Ridge National Laboratory, Oak
Ridge, Tennessee 37831, United States
| | - Bobby G. Sumpter
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Computer
Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Liang Hong
- Institute of Natural Science & Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Panchapakesan Ganesh
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Xiang-qiang Chu
- Department
of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, United States
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Senses E, Faraone A, Akcora P. Microscopic Chain Motion in Polymer Nanocomposites with Dynamically Asymmetric Interphases. Sci Rep 2016; 6:29326. [PMID: 27457056 PMCID: PMC4960532 DOI: 10.1038/srep29326] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 06/16/2016] [Indexed: 11/30/2022] Open
Abstract
Dynamics of the interphase region between matrix and bound polymers on nanoparticles is important to understand the macroscopic rheological properties of nanocomposites. Here, we present neutron scattering investigations on nanocomposites with dynamically asymmetric interphases formed by a high-glass transition temperature polymer, poly(methyl methacrylate), adsorbed on nanoparticles and a low-glass transition temperature miscible matrix, poly(ethylene oxide). By taking advantage of selective isotope labeling of the chains, we studied the role of interfacial polymer on segmental and collective dynamics of the matrix chains from subnanoseconds to 100 nanoseconds. Our results show that the Rouse relaxation remains unchanged in a weakly attractive composite system while the dynamics significantly slows down in a strongly attractive composite. More importantly, the chains disentangle with a remarkable increase of the reptation tube size when the bound polymer is vitreous. The glassy and rubbery states of the bound polymer as temperature changes underpin the macroscopic stiffening of nanocomposites.
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Affiliation(s)
- Erkan Senses
- NIST Center for Neutron Research, National Institute of Standards and Technology Gaithersburg, MD 20899-8562, USA
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-2115, USA
| | - Antonio Faraone
- NIST Center for Neutron Research, National Institute of Standards and Technology Gaithersburg, MD 20899-8562, USA
| | - Pinar Akcora
- Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Castle Point on Hudson, Hoboken, NJ 07030-5942
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